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Preparation method for paperboard with high color fastness

A technology of color fastness and cardboard, applied in the field of papermaking, can solve the problems of affecting the appearance and use effect, the overall thickness of the cardboard increases, and the color paper is easy to be damaged, and achieves high binding force, high color fastness and compatibility Good results

Active Publication Date: 2018-10-02
东莞市东彩印刷包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing cardboard is basically dyed with surface sizing, or a layer of colored paper is pasted on the surface of the cardboard. The former is likely to cause uneven dyeing and low color fastness, while the latter has high processing costs and will cause The overall thickness of the cardboard increases, and the colored paper is also easily damaged, which affects the appearance and use effect

Method used

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  • Preparation method for paperboard with high color fastness

Examples

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Effect test

Embodiment 1

[0028] A method for preparing paperboard with high color fastness, comprising the steps of:

[0029] (1) beating: the coniferous wood pulp with a cellulose concentration of 10wt% and the hardwood pulp with a cellulose concentration of 8wt% are knocked out respectively to obtain the softwood pulp after knocking and the hardwood pulp after knocking;

[0030] (2) Wood pulp mixing: the softwood pulp after beating and the hardwood pulp after beating are mixed according to the cellulose dry weight ratio of 7:4 to obtain mixed wood pulp;

[0031] (3) Papermaking: add internal pulp sizing agent, direct dye and color fixing agent to the mixed wood pulp, after stirring evenly, carry out papermaking, pre-drying, coating, post-drying, calendering, curling and trimming successively, that is A cardboard with high color fastness is obtained.

[0032] Wherein, in the step (1), the softwood pulp is knocked to 16.5°SR, and the hardwood pulp is knocked to 27.5°SR.

[0033] Wherein, the softwoo...

Embodiment 2

[0045] A method for preparing paperboard with high color fastness, comprising the steps of:

[0046] (1) beating: the coniferous wood pulp with a cellulose concentration of 8wt% and the hardwood pulp with a cellulose concentration of 6wt% are knocked out respectively to obtain the softwood pulp after knocking and the hardwood pulp after knocking;

[0047] (2) wood pulp mixing: the softwood pulp after beating and the hardwood pulp after beating are mixed according to the cellulose dry weight ratio of 3:1 to obtain mixed wood pulp;

[0048](3) Papermaking: add internal pulp sizing agent, direct dye and color fixing agent to the mixed wood pulp, after stirring evenly, carry out papermaking, pre-drying, coating, post-drying, calendering, curling and trimming successively, that is A cardboard with high color fastness is obtained.

[0049] Wherein, in the step (1), the softwood pulp is beaten to 15°SR, and the hardwood pulp is knocked to 25°SR.

[0050] Wherein, the softwood pulp ...

Embodiment 3

[0062] A method for preparing paperboard with high color fastness, comprising the steps of:

[0063] (1) beating: the coniferous wood pulp with a cellulose concentration of 12wt% and the hardwood pulp with a cellulose concentration of 10wt% are knocked out respectively to obtain the softwood pulp after knocking and the hardwood pulp after knocking;

[0064] (2) wood pulp mixing: the softwood pulp after beating and the hardwood pulp after beating are mixed according to the cellulose dry weight ratio of 4:3 to obtain mixed wood pulp;

[0065] (3) Papermaking: add internal pulp sizing agent, direct dye and color fixing agent to the mixed wood pulp, after stirring evenly, carry out papermaking, pre-drying, coating, post-drying, calendering, curling and trimming successively, that is A cardboard with high color fastness is obtained.

[0066] Wherein, in the step (1), the softwood pulp is beaten to 18°SR, and the hardwood pulp is knocked to 30°SR.

[0067] Wherein, the softwood pu...

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Abstract

The invention specifically relates to a preparation method for a paperboard with high color fastness, belonging to the technical field of papermaking. The preparation method comprises the following steps: (1) beating: separately beating softwood pulp with a cellulose concentration of 8-12 wt% and hardwood pulp with a cellulose concentration of 6-10wt%; (2) wood pulp mixing: mixing the softwood pulp with the hardwood pulp according to a dry cellulose weight ratio of (3-4): (1-3); and (3) papermaking: adding an internal sizing agent, a direct dye and a fixing agent into the mixed wood pulp, andafter uniform mixing under stirring, successively carrying out papermaking, pre-drying, coating, post-drying, calendering, crimping and trimming. According to the invention, the cellulose content of the wood pulp is reasonably controlled, which is beneficial for the infiltration of the direct dye into cellulose; and through the cooperation between the fixing agent and the direct dye, the cellulosecan be sufficiently dyed, and the binding force between the cellulose and direct dye molecules is high, so the paperboard with uniform dyeing, high color fastness and certain mechanical properties isobtained.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing cardboard with high color fastness. Background technique [0002] Cardboard refers to the paper material whose thickness is between paper and cardboard. With the improvement of manufacturing technology, the existing color cardboard is used in a wider range of fields, such as packaging for commodities, replacing plastic products, and being more environmentally friendly. . [0003] The existing cardboard is basically dyed with surface sizing, or a layer of colored paper is pasted on the surface of the cardboard. The former is likely to cause uneven dyeing and low color fastness, while the latter has high processing costs and will cause The overall thickness of the cardboard increases, and the colored paper is also easily damaged, which affects the appearance and use effect. Contents of the invention [0004] In order to overcome the disadvantages and ...

Claims

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Application Information

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IPC IPC(8): D21H15/10D21H21/16D21H21/28D21H17/14D21H17/17D21H21/14D21H21/34D21H21/54
CPCD21H15/10D21H17/14D21H17/17D21H21/14D21H21/16D21H21/28D21H21/34D21H21/54
Inventor 王炳南王绍球
Owner 东莞市东彩印刷包装有限公司